Computer Task Group, Incorporated (commonly referred to as CTG) is an American multinational company headquartered in Buffalo, New York, that provides information technology staffing and solutions.

CTG was founded in 1966 by Randolph A. Marks and G. David Baer, two former employees of IBM, in Buffalo, New York. It was then called Marks-Baer Inc. (MBI). MBI's initial market was the medical industry, since both founders had experience in that area. By 1968, staff had grown to 20 and Marks-Baer Inc. changed its name to Computer Task Group Inc. (CTG). The company went public in 1969.

In 1975, CTG decided to become a national company. CTG accelerated growth through acquisitions beginning in 1980 and within 5 years, acquired 15 companies. In 1986, the company made its first international acquisition, Shubrook International, Ltd., a software consulting firm based in Chertsey, England.

In 2013, CTG's acquired etrinity N.V., a healthcare IT solutions company in Belgium.

CTG develops IT solutions to address the business needs of companies in several industries including healthcare and technology services, and provides managed services IT staffing for technology companies and large corporations. The company concentrates on the financial services, telecommunications, government, industry, life sciences, and healthcare sectors. The scope of offered services includes development and integration, application management, information security, system and process assessment, and IT consulting.

CTG Belgium created a software testing methodology called FASTBoX (Framework for Automated Software Testing Based On eXperience).

CTG operates in North America (US and Canada) and Western Europe (Belgium, Luxembourg and United Kingdom). It counts about 350 clients; its largest clients are IBM and SDI International. As of December 2015, the company employs approximately 3,600 people worldwide, with 2,700 in the United States and Canada and 700 in Europe.

In 2015, the company operated 13 subsidiaries: